ML17346A662

Forwards Request for Addl Info Re Util 831108 Response to Generic Ltr 83-28,Items 4.2.1 & 4.2.2 Concerning Preventive Maint Program for Reactor Trip Breaker/Maint & Trending. Response Requested by 850104

ML17346A662
Person / Time
Site:	Turkey Point
Issue date:	11/30/1984
From:	Varga S Office of Nuclear Reactor Regulation
To:	Williams J FLORIDA POWER & LIGHT CO.
References
GL-83-28, TAC-53160, TAC-53161, NUDOCS 8412140054
Download: ML17346A662 (7)

Text

t sf November 30, 1984 Docket Nos.

50-250 and 50-251 Mr. J.

W. Williams, Jr., Vice President Nuclear Energy Department Florida Power and Light Company Post Office Box 14000 Juno Beach, Florida 33408

Reference:

TAC Nos.

53160 and 53161 ORB¹1RDG DEisenhut DMcDonald EJordan JPartlow OELD Loca PDR Gray file CPArrish NRomney PMcKee ACRS (10)

Distribution Docket

SUBJECT:

PREVENTIVE MAINTENANCE PROGRAM FOR REACTOR TRIP BREAKER/MAINTENANCE AND TRENDING - GENERIC LETTER (GL) 83-28, ITEMS 4.2. 1 and 4.2.2 By letter dated November 8, 1983, you submitted your response to GL 83-28, "Required Actions Based on Generic Implications of Salem ATWS Event", dated July 8, 1983.

The Equipment Qualification Branch(EQB) assisted by Idaho National Engineering Laboratory

( INEL) is currently reviewing your responses to GL 83-28, Items 4.2. 1 and 4.2.2.

As the result of our review to date, we need the additional information identified in the enclosure to this letter.

We request that the response be provided by January 4,

1985, in order to meet our current review schedule.

The reporting and/or bookkeeping requirements of this letter affect fewer than ten respondents;

there, OMB clearance is not required under P.L.86-511.

Sincerely,

/s/SAVarga

Enclosure:

As stated cc w/enclosure:

See next page Steven A. Varga, Chief Operating Reactors Branch ¹1 Division of Licensing ORB¹1:

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Docket Nos.

50-250 and 50-251 UNITEDSTATES t

NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 November 30, 1984 Mr. J.

W. Williams, Jr., Vice President Nuclear Energy Department Florida Power and Light Company Post Office Box 14000 Juno

Beach, Florida 33408

Reference:

TAC Nos.

53160 and 53161

SUBJECT:

PREVENTIVE MAINTENANCE PROGRAM FOR REACTOR TRIP BREAKER/MAINTENANCE AND TRENDING - GENERIC LETTER (GL) 83-28, ITEMS 4.2. 1 and 4.2.2 By letter dated November 8, 1983, you submitted your response to GL 83-28, "Required Actions Based on Generic Implications of Salem ATWS Event", dated July 8, 1983.

The Equipment Qualification Branch(EQB) assisted by Idaho National Engineering Laboratory

( INEL) is currently reviewing your responses to GL 83-28, Items 4.2. 1 and 4.2.2.

As the result of our review to date, we need the additional information identified in the enclosure to this letter.

We request that the response be provided by January 4,

1985, in order to meet our current review schedule.

The reporting and/or bookkeeping requirements of this letter affect fewer than ten respondents;

there, OMB clearance is not required under P.L.86-511.

Sincerely,

Enclosure:

As stated e en a ga, ref Operating Reactor Branch bl Division of Licensing cc w/enclosure:

See next page

J.

W. Williams, Jr.

Florida Power and Light Company Turkey Point Plants Units 3 and 4

cc:

Harold F. Reis, Equire Newman and Holtziner P.C.

1615 L Street, N.W.

Washington, DC 10036 Bureau of Intergovernmental Relations 660 Apalachee Parkway Tallahassee, Florida 33130 Norman A. Coll, Esquire

Steel, Hector and Davis 4000 Southeast Financial Center Miami, Fl orida 33131-2398 Mr.

Ken N. Harris, Vice President Turkey Point Nucl ear Pl ant Florida Power and Light Company P.O.

Box 013100 Miami, Florida 33101 Mr.

M.

R. Stierheim County Manager of Metropolitan Dade County Miami, Florida 33130 Resident Inspector Turkey Point Nuclear Generating Station U.S. Nuclear Regulatory Commission Post Office Box 57-1185 Miami, Florida 33257-1185 Regional Radiation Representative EPA Region IV 345 Courtland Street, N.W.

Atlanta, GA 30308 Mr. Jack Shreve Office of the Public Counsel Room 4, Holland Building Tallahassee, Florida 32304 Administrator Department of Environmental Regulation Power Plant Siting Section State of Florida 2600 Blair Stone Road Tallahassee, Florida 32301 James P. O'Reilly Regional Administrator, Region II U.S Nuclear Regulatory Commission Suite 2900 101 Marietta Street

Atlanta, GA 30303 Martin H. Hodder, Esquire 1131 N.E. 86th Street Miami, Florida 33138 Joette Lorion 7269 SW 54 Avenue Miami, Florida 33143 Mr. Chris J.

Baker, Plant Manager Turkey Point Nuclear Plant Florida Power and Light Company P.O.

Box 013100 Miami, Florida 33101 Attorney General Department of Legal Affairs The Capitol Tallahassee, Florida 32304 Mr. Ulray Clark, Administrator Radiological Health Services Department of Health and Rehabilitative Services 1323 Winewood Blvd.

Tallahassee, Florida 32301

TURKEY POINT UNITS 3 AND 4 REOUEST FOR ADDITIONAL INFORMATION GL 83-28 ITEMS 4. 2. 1 ANO 4. 2. 2 TASK A6814 INTRODUCTION Florida Power and Light Company, the licensee for Turkey Point Units 3

and 4, submitted their response to Generic Letter 83-28 on November 8, 1983. 'hat submittal has been reviewed with respect to Items 4.2. 1 and 4.2.2. of the Generic Letter.

The licensee's response was not sufficiently detailed to permit an evaluation of the adequacy of the periodic maintenance and trending programs for the breakers.

The following additional information is required to evaluate compliance with Items 4.2:1 and 4.2.2.

l.

Item 4.2. 1 - Periodic Maintenance Program for Reactor Trip Breakers.

1. 1 Criteria for Evaluatin Com liance with Item 4.2. 1 The Turkey Point Units 3 and 4 Reactor Trip Systems utilize Westinghouse OB-50 circuit breakers.

The primary criteria for an acceptable maintenance program for this breaker are contained in Maintenance Pro ram for OB-50 Reactor Tri

~Switch ear, Rev.

0, dated October 14,

1983, by Westinghouse.

The NRC Staff, Equipment gualification

Branch, has reviewed and endorsed the Westinghouse Maintenance Program for OB-50 Switchgear.

Specifically, the criteria used to evaluate compliance include those items in the Westinghouse program that relate to the safety function of the breaker, supplemented by those measures that must be taken to accumulate data for trending.

1.2 Issues Relatin to Item 4.2. 1 The licensee response states that "Every 6 months, each circuit breaker is cleaned, lubricated as required, checked for alignment, checked for proper operation of shunt and undervoltage trip devices, and tested on the bench and in"place.

Every refueling overhaul operability of the shunt trip is checked via the manual trip pushbuttons."

The response identifies, but does not include, the procedures governing reactor trip breaker periodic maintenance.

Does the Turkey Point Units 3 and 4 periodic maintenance program for the reactor trip breakers

include, on a six month basis:

l.

Verification of trip bar freedom; 2.

Verification of operating mechanism alignment and

freedom, using the procedure identified in'he Westinghouse program; 3.

Retaining ring verification, 33 places; 4.

Verification of nut and bolt tightness; 5.

Verification of pole bases physical condition; 6.

Verification of arcing and main contacts physical condition, using the procedure identified in the Westinghouse program; 7.

Verification of insulating link's physical condition; 8.

Verification of wiring insulation and termination physical condition; 9.

Verification of arc chute physical condition; 10.

Verification of breaker cleanliness; Undervoltage Trip Attachment (UVTA) dropout voltage test and lubrication, using the procedure identified in the Westinghouse program; 12.

Shunt Trip Attachment (STA) operation verification; 13.

Verification of operation of auxiliary switches; 14 'nspection of positioning lever condition, using the procedure identified in Westinghouse program; 15.

Functional test of the breaker prior to returning it to

service, using the procedure identified in the Westinghouse program.

Does the Turkey Point Units 3 and 4 periodic maintenance program for the reactor trip breakers

include, on a

refueling interval basis:

2.

Veri'fication of cell interlock operation; Measurement of trip force required, using the procedure identified in the Westinghouse program;

3.

Breaker response time for undervoltage trip; 4.

Functional test of the breaker prior to returning it to

service, using.the procedure identified in the Westinghouse program.

The licensee is to confirm that the periodic maintenance program includes these 19 items at the specified intervals or commit to their inclusion.

2.

Item 4.2.2 Trending of Reactor Trip Breaker Parameters to Forecast Oegradation of Operability.

2. 1 Criteria for Evaluatin Com liance with Items 4.2.2 Four parameters have been identified as trendable and are included in the criteria for evaluation.

These are (1) undervoltage trip attachment dropout voltage, (2) trip force, (3) breaker response time for undervoltage trip, and (4) breaker insulation resistance.

2.2 Issues Relatin to Item 4.

.2 The licensee submittal states that "No specific trending of reactor trip breaker opening times is performed."

The response does not describe any trending program as being in place at Turkey Point or planned.

The licensee is to commit to inclusion of trip force, breaker response time and dropout voltage for undervoltage trip and breaker insulation resistance as trending parameters.

The licensee should also identify the organization which will perform trend analysis, how often the analysis will be performed and how the information derived from the analysis will be used to affect periodic maintenance.

'7105